can anyone give practice questions of science ch 5 bio class 9
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Question is attached. Please help me in this Time and work problem. Please don't spam. The question is as follows Two pipes P and Q would fill an empty cistern in 24 minutes and 32 minutes respectively. Both opened together,when must the 1st tap be turned off so that the empty cistern is filled in 16 minutes.
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these ,I have more ,if u want I can give,ok I am giving u more questions.see
this I have edited more .
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